X d defensive publication

ABSTRACT

THE PROCESS FOR PREPARING HYDROXYL TERMINATED POLYALKYLENE POLYETHERS STABILIZED BY CONVERSION TO ACETALS THROUGH REACTION WITH ALPHAHALOALKYL ALKYL ETHERS IS IMPROVED BY HEAT TREATING THE ACETALS IN THE PRESENCE OF AN ALKALI CARBONATE TO ELIMINATE FREE FHYDROHALIDE ACID AND OXONIUM HYDROGEN HALIDE.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 0.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofilce makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED MARCH 27, 1973 T908,003 PROCESS FOR STABILIZED POLYETHERSMichael Kokorudz, 17994 Parke Lane, Grosse lie, Mich. 48138 Filed June21, 1971, Ser. No. 155,329 Int. Cl. C07c 43/30 U.S. Cl. 260-615 A NoDrawing. 8 Pages Specification The process for preparing hydroxylterminated polyalkylene polyethers stabilized by conversion to acetalsthrough reaction with alphahaloal-kyl alkyl ethers is improved by heattreating the acetals in the presence of an alkali carbonate to eliminatefree hydrohalide acid and oxonium hydrogen halide.

